Grain-dump.



No. 762,970. 7 PATENTEDJUNE 21, 1 904 P. WILSON & R. -A. HILLING.

GRAIN DUMP.

APPLIQATION FILED 0OT.26, 1903.

2 SHEETS-SHEET 1.

N0 MODEL.

N Z ufihw To u r mu 2 a. mrmw T M E rm: mum: PETERS :0. wow m UNITED STATES FRANK WVILSON AND RICHARD A.

Patented June 21, 1904i HILLING, OF MANITO, ILLINOIS.

GRAIN-DUMP.-

SPECIFICATION forming part of Letters Patent No. 762,970, dated June 21, 1904.

Application filed October 26, 1903.

To all whom it may concern:

Be it known that we, FRANK WILsON and RICHARD A. HILLING, citizens of the United States, residing at Manito, in the county of Mason and State of Illinois,-have invented cer tain new and useful Improvements in Grain- Dumps; and we do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

of the device, showing part of the cylinder broken away to show inner arrangement. Fig. 4 is a perspective view of a cross-head and rod connection therewith. Fig. 5 is a perspective view of a connection for the lower end of a rod shown in Fig. 4. Fig. 6 is a perspective view of a bracket to which the portion shown in Fig. 5 is adapted to connect. Fig. 7 is a sectional elevation of a conductor used with the cylinder of the device. Fig. 8 is a sectional elevation of a portion of the cylinder and piston and piston-rod of a moditied form of the invention. Fig. 9 is alsoa sectional view of a piston of another form. Fig. 10 is perspective view of a-portion of the dumping platform and stationary platform adjacent thereto, showing a locking means for the former.

In the drawings, A represents the platform, suitably mounted at B, so as to pivot freely at that point, said pivot being, preferably, a little to one side of the balancing-point, so

i that a greater weight will lie at one side of the pivot or fulcrum than at the other.

Serial No. 178,510. (No model.)

a vertical cylinder D, whose base E is secured to the platform C in suitable manner. Secured near the top of the cylinder is a yokeframe F, whose upper portion constitutes a guide for a piston-rod G. v The said frame F is provided inside with guideways H and a cross-head I, Fig. 4:, is adapted to move up and down thereon, the piston-rod passing through such cross-head into the cylinder, where it is fitted with the usual piston-head JQ The upper portion of the frame F is steadied by means of braces K, which may be secured to a post or, as shown in Fig. 1, to the building by which the dump is situated. Connected into both the top and bottom of the cylinder D is a pipe L, by which the upper portion of the said cylinder and the bottom portion thereof may communicate with one another. In said pipe is located a cut-off valve M and a check-valve N, the latter being shownin detail in Fig. 7 A large opening therethrough (indicated by O) is closed by the flap P, there being a small aperture Q through and consists, first, of a lever T, pivoted to and below the platform C and having connected to its lower end a bar U, whose other end is pivoted to an arm V, pivoted at W to a suitable support (not shown) by which said rod V may be moved beneath or away from under the platform. When under the same, it pre-' vents the platform lowering by weight imposed thereon when the other mechanism hereinbefore described is not in proper. condition for receiving such weight.

The mode of use of the improved dumping arrangement is as follows: The loaded wagon is driven upon the platform to its proper position, the lever T being set so that the arm V is thrust beneath the platform to sustain it or by closing the cut-off M. The reason for closing the latter will be presently understood when it is known that the cylinder is filled with a fluid. It will be seen that when the platform is in its normal position the piston J is in the upper portion of the cylinder. (See Fig. 3.) The cylinder is designed to contain a fluid, preferably oil, of medium thickness that will run slowly, and in the position just described the piston will be above and resting upon the oil if the cut-ofl M be closed, the pipe L and the check-valve being full of the fluid. 1f the cut-off now be opened, the oilwill pass through it into the top of the cylinder above the piston by the weight of the platform and its load being imposed upon said piston through the pitman R and piston-rod G. The flap P of the check-valve is so placed with reference to the direction of flow of the oil at this particular time that it is kept closed upon the opening 0 of the valve by pressure of said oil and but a small exit for the oil is provided through the aperture Q. It will thus be seen that by the escape of the oil through this hole the platform will be gradually permitted to descend to its dumping position. Evidently the apparatus cantakecare of itself after opening the cutoff while the attendant is looking after other matters, or, if desired, such attendant may govern the descent of the platform by turning the cut-off to a greater or less extent to reduce the size of its opening or enlarge the same, thus doing away with the check-valve, although, of course, it is preferred to use the latter for the reasons above statedi. a, that of permitting the dump to take care of itself. When the platform has reached its lowest point and the load has been discharged from the wagon, the latter, in being driven off at the far side of the platform lowers such further side by the weight put upon it, with the result that the end of the platform which hitherto has been lowered is made to rise by tilting on the fulcrum at B. The result of this action is that the pitman is raised, together with the piston-head J, thereby forcing the oil out at the top of the cylinder into the pipe L back through the check-valve into the lower portion of said cylinder, the pressure thus set up in the direction named serving to openthe flap P of the said check-valve to permit the oil to easily pass through in a volume to allow the platform to quickly come to its initial position. Now if the cut-off be closed it must be evident that since no escape for the oil can take place the platform must be prevented lowering, no matter how much weight is imposed thereon. Various changes may be made in the means for permitting the slow passage of the oil in one direction and the open flow in the otheras, for instance, as shown in Fig. 8, the lower end of the piston-rod is hollow, with an opening J through the wall into the upper portion of the cylinder, a flap-valve J 2 being placed in the piston and kept closed by a spring. A hole J in the valve permits slow passage of oil when the piston descends; but the valve opens wide when the said piston travels in the upward direction. By this means the oil does not need to pass through the pipe L, as before described, but merely passes through the piston. Also inFig. 9 is shown another form in which the valve J* is in the piston-head and held closed by a spring J attached to a yokepiece J there being the hole J 7 in said valve, as before. In addition to these changes also other constructions maybe employed as to the receptacle for the oil in its travel from beneath the piston, although it is preferable to let the cylinder be the container.

It is to be remembered that either the cutoff M or the latch mechanism T U V may. be used, or both may be used together, as may be found desirable. Evidently if the valve J or J 4 is employed in the piston the platform would necessarily have to be held by the said portions T U V, since no cut-ofl valve could be arranged.

We claim 1. In a grain-dump, a cylinder erected adjacent thereto, .a pivotally-supported platform, a piston for the cylinder, a connection necting the upper and lower portions of the cylinder and a valve in the pipe for controlling the passage of fluid passing through the said pipe, there being fluid in the cylinder, the said valve being constructed to allow slow passage of the fluid therethrough during the descent of the piston and quick passagetherethrough in the rising movement of said piston for the purposes explained. I

2. In a grain-dump of the character described, a vertical fluid-containing cylinder, a pivotal platform, a piston adapted to rise and fall within the cylinder, a valve controlled passage between the upper and lower portions of the cylinder, a guide for the pis ton, a pitman having pivotal connection with the piston-rod and connected to the platform all being arranged substantially as set forth and described.

. 3. In a grain-dump, the platform A, the cylinder D adjacent thereto, piston J within the cylinder, the piston-rod G, the guide F, the cross-head I within the frame F and supporting the piston rod, apitman connected between the cross-head and the platform substantially as described, the pipe L connected into the top and bottom extremities of the cylinder, and the check-valve N in said pipe comprising the valve-seat having the opening 0 therethrough, the flap P closing such opening, there being an aperture Q-in said flap all for the purposes explained.

4. In a grain-dump, the platform A, the

cylinder D adjacent thereto, piston J Within ing, there being an aperture Q in said flap,v the cylinder, the piston-rod (3r, the guide F, and a cut-01f valve M in said pipe L all-for the cross-head 1 Within the frame F and supthe purposes explained. I porting the piston rod, a pitman connected In testimony whereof We affix our signatures 5 between the cross-head and the platform subin presence of two Witnesses.

stantially as described, the pipe L connected FRANK WILSON.

into the top and bottom extremities of the RICHARD A. HILLING. cylinder, the check-valve N in said pipe com- Witnesses: prising the valve-seat having the opening 0 A. A. HAMILTON,

IO therethrough, the flap Pclosing such open- C. E. HOWARD. 

